Cores Pore Structure Characteristics and Relative Permeability Analysis in Steam Flooding Based on CT Scanning

doi:10.3969/j.issn.1006-6535.2023.01.011

Abstract

Abstract: In order to identify the effect of steam flooding on the pore structure characteristics of heavy oil reservoirs in unconsolidated sandstone, in a study case of LDB Oilfield, CT technology is applied to scan the cores in different steam flooding stages, a three-dimensional digital core model is constructed and a pore network model is extracted to obtain the core porosity, absolute permeability, pore structure characteristics and other parameters at different steam flooding stages, as well as working out the relative permeability curve by flow simulation and performing quantitative statistics and analysis. The result shows: as the steam flooding progresses, the pore space of the core becomes larger, leading to increase in average pore radius, average throat radius, porosity and permeability, and enhancing the permeability and improving the pore structure. The study results provide technical support for the design of heavy oil reservoir development with steam flooding.

Key words: thermal recovery of heavy oil, steam flooding, CT scanning, pore structure, pore network model

CLC Number:

TE135

Li Aifen, Gao Ziheng, Jing Wenlong, Fu Shuaishi. Cores Pore Structure Characteristics and Relative Permeability Analysis in Steam Flooding Based on CT Scanning[J]. Special Oil & Gas Reservoirs, 2023, 30(1): 79-86.

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